The human eye at night sees planets in our solar system as round, sphere like object, we can all agree on. How is this planet we live on any different and why?
The earth is not a planet.
Are you willing to back that up with any proof?
Yes. See: Earth Not a Globe by Samuel Birley Rowbotham
Here's a quote from Mr. Rowbotham, "There are rivers that flow for hundreds of miles towards the level of the sea without falling more than a few feet — notably, the Nile, which, in a thousand miles, falls but a foot. A level expanse of this extent is quite incompatible with the idea of the Earth's convexity. It is, therefore, a reasonable proof that Earth is not a globe."
Cairo, Egypt, at the mouth of the Nile has an elevation 75 ft above sea level. Khartoum, Sudan, also directly on the Nile is 1000 miles south has an elevation 1247 ft. About halfway between them is the Nile city of Aswan, Egypt, elevation 646 ft. The modern theodolite (a surveying tool) was invented in 1787, 29 years before Rowbotham's birth. He has no excuse for the inaccuracy of his statement. This gross error in his understanding of such simple geography absolutely disqualifies him from any serious participation in a discussion of the shape of the planet.
Sources: Google and Wikipedia.